diff --git a/.travis-build.sh b/.travis-build.sh
index 672d282cc..78e7583a8 100644
--- a/.travis-build.sh
+++ b/.travis-build.sh
@@ -8,6 +8,7 @@ if [ "$TRAVIS_OS_NAME" = linux -o -z "$TRAVIS_OS_NAME" ]; then
     cmake -DUSE_QT5=OFF .. 
     make -j4
 elif [ "$TRAVIS_OS_NAME" = osx ]; then
+    export Qt5_DIR=$(brew --prefix)/opt/qt5
     mkdir build && cd build
     cmake .. -GXcode
     xcodebuild